Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,14 +1,38 @@
 # Contributing
 
-Just let me know before you work on something by opening an issue or commenting on an existing one.
+#### Pull Requests
+
+Let me know before you work on something by opening an issue or commenting on an existing one.
 I don't want your effort to be wasted!
 
-Open issues! Issues for features, issues for problems...
+#### Issues
+
+Open issues! Search for issues first, but open issues for features, issues for problems...
 
 Feel free to open issues in a "meta" context, like "hey, maybe you should tag issues with 'good first issue'" etc.
 
+https://github.com/1j01/jspaint/issues
+
+You can also just [email me](mailto:isaiahodhner@gmail.com) if you prefer (and I'll probably create an issue).
+
+#### Windows 98
+
+JS Paint's GUI is primarily based on Paint from Windows 98.
+There's a nice [online emulator here](https://copy.sh/v86/?profile=windows98)
+that you can play around with and/or use as a reference.
+
+You can open issues relating to that UI, but also for general functionality that isn't necessarily in mspaint,
+for instance jspaint already has affordances like unlimited undos, extra menu items, and shortcut-like features.
+
+## Dev Setup
+
+* Install Node.js if you don't have it (and maybe update it)
+* Clone the repo
+* Install dependencies with `npm i`
+* Run `npm run dev` to start up a live-reloading web server
+
 ### Project Structure
 
-it's messy; a lot of stuff is in a file simply called "functions.js" (to give you an idea of it)
+It's messy. A lot of stuff is in a file simply called "functions.js", to give you an idea of it.
 
 I can go into more detail [if you want..](https://github.com/1j01/jspaint/issues)